1. Duke University Medical Center Staff Engineer MPE design and troubleshooting Web site info : http:/eo.mc.duke.edu

3. Who is Green? Is your toilet or faucet in your room leaking? How long of a shower did you take this morning?

4. Baseline consumption data Duke Hospital and Medical Center Total of 250 million gallons per year About 100 sterilizers About 125 cold rooms with water cooled condensers About 2500 toilets About 200 urinals About 900 patient beds

5. Baseline consumption data Duke Hospital and Medical Center Almost all laundry done off campus 15,000 to 20,000 ton of HVAC cooling load 7 million sf 100 gal per bed per day is typical for Hospitals - Includes laundry

6. Baseline consumption data Duke Hospital and Medical Center Hospital base load: Read meters every couple of hours for 24 hours Mid week: 60 GPM at night 225 GPM during the day! MSRB- Lab- 39 flushes/fixture/day

7. Water CONSERVATION projects Toilet and urinal retrofits- 1.6 GPF and green handles.125 GPF urinals vs waterless and “special” inserts 4 to 8 times more expensive to maintain Toilet cleaning and EVS Shower heads- caution must be used. Getting hot water recirculating systems working Recirulating water cooled condensers- 3 GPM per ton

8. Water CONSERVATION projects Cycles of concentration on cooling towers alarms for overflow; metering- consumption greater than 0.6 gpm per ton=waste “Camel” system for water seal vacuum pumps saves 7 gpm costs about $20k Economizers for sterilizers- saves ½ GPM, $2000 RO filters - tempering valve -77F-reduces waste Post a sign in each bathroom with your number!

9. Water RECOVERY projects AHU condensate- a big one- espec. 100% OA units- Rain water recovery- maybe RO discharge do not use brine from pretreatment softeners but carbon and sand are okay 1 gal is wasted per gal consumed Connect backup city water cooling systems to your condensate recovery systems- MRI, Linac, Refrigeration Must periodically test water quality

10. Disaster planning Disaster can strike without a drought Develop relation with local supplier Bottle size vs 6,000 gal tanker Planned orderly shutdowns Cooling Towers, etc. Split processes from potable. How many days before you move out? Where will you send the patients?

11. Strength in numbers Small changes can make a big difference GM switches to 20W oil takes 300k cars off the road. Bottled water uses a lot of resources, get reusable ones. Potable water is a small number overall.

12. Water conservation at HOME Water use at home about equal to commercial Family of four =4,000 gallons is really good. Shut off main valve to house when you leave and listen for inrush when you come back

13. Water conservation at HOME Close off toilet valve overnight to check for leaks TOTO brand very good. Front loader washer- 25 gal vs. 40 My family of 5 uses 3 to 5000 gal per month

14. War stories Waterless cleaners- flammable Turning off flush valves-sleepers Single vs dual lever faucets 42M gallons saved thus far, target is in the 70M range